干旱区生态环境知识资源中心(Arid): 19812001年中国西北干旱区NDVI变化分析

Arid

	19812001年中国西北干旱区NDVI变化分析
其他题名	Change of NDVI based on NOAA image in northwest arid area of China in 1981 -2001
	李秀花; 师庆东; 常顺利; 郭娟; 巴音达拉; 齐家国
ISSN	1000-6060
出版年	2008
卷号	31 期号:6 页码:940-945
中文摘要	采用19812001年连续21年的NOAA／AVHRR的NDVI植被覆盖指数，空间分辨率为8km*8km，时间分辨率是准半月，分析了中国西北干旱区四个地区（新疆的南疆地区、北疆地区、甘肃内蒙古河西走廊地区和青海柴达木地区）19812001年连续21年的NDVI变化。结果显示：19812001年中国西北干旱区四个地区的NDVI虽然普遍不高（小于0．3），但是其在新疆的南、北疆处于增大的趋势，北疆19912001年的平均NDVI值比19811990年的平均值增加了2．48％，南疆的相应增幅较大为8．95％；甘肃内蒙古河西走廊地区的NDVI值年际变化不明显；青海的柴达木地区NDVI值则有减小的趋势，其19912001年的平均NDVI值比19811990年的平均值减少了2．76％。新疆植被覆盖的增加可能与大面积开荒等人为活动以及这一段时间新疆地区增温和增湿的自然气候变化有关，而青海柴达木地区植被覆盖的减少则可能存在更复杂的自然和人类活动等多方面的驱动因素。
英文摘要	The Change of vegetal index can reveal the evolvement of environment. Long-term quantitative analysis of vegetal distribution and change can illustrate the reason of environment change. Based on the continuous NOAA/ AVHRR data with the spatial resolution of 8 km * 8 km and the temporal resolution of half-month （ University of Maryland Global Land Cover Facility Data Distribution） between the years 1981 and 2001, by means of some image software such as ENVI 4.0, IDL6.0 and ArcGis, this paper develops the data sets of NDVI for analyzing and discussing the moving average change of annual NDVI in northwest arid area of China including the south and the north of Xinjiang, the Hexi Corridor of Gansu ＆ Inner Mongolia and the Qaidam basin of 2001 in order to find out the true reason that causes the change of environment in Qinghai continuously from 1981 to northwest arid area of China. The results are as follows： First, the whole NDVI value of 1991 -2001 in northwest arid area of China is not high（ less than 0.3 ）, but the annual NDVI value of Xinjiang is in the increasing trend. At the Hexi Corridor of Gansu ＆ Inner Mongolia, the NDVI value changes little. While at the Qaidam basin of Qinghai the NDVI value is in reducing. Second, the change of average NDVI in ten year scale is near to its annual change in northwest arid area from 1981 to 2001. Its average NDVI of 1991 -2001 is 2.48% higher than that of 1981 - 1990 in north Xinjiang and 8.95% higher than that in south Xinjiang. But its decade change is not very obvious at the Hexi Corridor of Gansu ＆ Inner Mongolia in 1981 - 2001. Synchronously there is a decreasing extent of 2.76% compared the average NDVI of 1991 -2001 with that of 1981 - 1990 at the Qaidam basin of. Qinghai. And the opening-up of wasteland by human and the ＂warming＂＆＂wetting＂ of climate contribute to the increase of NDVI value in Xinjiang. However, perhaps more intricate driving factors from both nature and human being lead to the decrease of NDVI value at the Qaidam basin of Qinghai.
中文关键词	NOAA影像 ; 西北干旱区 ; 变化分析
英文关键词	NDVI NOAA image northwest arid area NDVI change- analysis
语种	中文
国家	中国
收录类别	CSCD
WOS类目	REMOTE SENSING
WOS研究方向	Remote Sensing
CSCD记录号	CSCD:3453406
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222300
作者单位	新疆大学资源与环境科学学院干旱半干旱可持续发展国际研究中心, 新疆绿洲生态重点实验室, 乌鲁木齐, 新疆 830046, 中国
推荐引用方式 GB/T 7714	李秀花,师庆东,常顺利,等. 19812001年中国西北干旱区NDVI变化分析[J]. 新疆大学,2008,31(6):940-945.
APA	李秀花,师庆东,常顺利,郭娟,巴音达拉,&齐家国.(2008).19812001年中国西北干旱区NDVI变化分析.,31(6),940-945.
MLA	李秀花,et al."19812001年中国西北干旱区NDVI变化分析".31.6(2008):940-945.